Forerunner of the Lost

When Forerunner of the Lost Kingdom enters
the battlefield, you may search your library for a
Zombie card, reveal it, shuffle your library and
put that card on top of it.
Whenever another Zombie enters the battlefield
under your control, each opponent loses life
equal to the number of Deserts on the battlefield.
This ability only triggers only once each turn.
His arrival signals the coming of Abarath's glory.